Post by John SAre you seriously comparing rider behavior in Switzerland, Germany, and
Spain with Philly? Really?
Actually the New Jersey Transit River Line has such a system, I'm not sure
such a system would work with a claimed 900,000 riders per day rather than
the approximately 14,000 per day the River Line apparently has. Of course
a conductor checking for passes and tickets on the Regional Rail is really
an early ancestor of checking for tickets at random.
I do know it would take a new mindset but I imagine that the first few fines
for not having a fare instrument would deal with that problem.